How much protein is in Onions?

Onions, red contains 0.94g of protein per 100g. This is 2% of the recommended daily value of 50g.

Is Onions good for weight loss?

Onions, red has 44 calories per 100g. With fewer than 50 kcal per 100g, it is a very low-calorie food and can be included freely in most weight-loss diets.

🥦 Vegetables and Vegetable Products

Calories in Onions, red

Q: How many calories are in Onions?

Onions, red contains 44 calories per 100g. A typical serving of 1 Onion (197g) provides 87 calories.

Q: How many carbs are in Onions?

Onions, red contains 9.93g of carbohydrates per 100g.

Complete nutrition facts, macros, vitamins, and minerals — per 100g and per serving. Data sourced from USDA FoodData Central Foundation Foods database.

44 kcal

per 100g

Protein 0.94g

Carbs 9.93g

Fat 0.1g

Fiber 2.2g

Calories by Serving Size

100g

44 kcal

P 0.94g C 9.93g F 0.1g

1 Onion (197g)

87 kcal

P 1.9g C 19.6g F 0.2g

200g

88 kcal

P 1.9g C 19.9g F 0.2g

50g

22 kcal

P 0.5g C 5g F 0.1g

Full Nutrition Facts

Per 100g — daily values based on a 2,000 calorie diet

Nutrition Facts

Serving size: 100g

Calories 44

% Daily Value*

Total Fat 0.1g 0%

Sodium 1mg 0%

Total Carbohydrate 9.93g 4%

Dietary Fiber 2.2g 8%

Protein 0.94g 2%

Vitamin C 8.1mg 9%

Calcium 17mg 1%

Iron 0.24mg 1%

Potassium 197mg 4%

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

How does Onions fit your daily goals?

🏃

9 min

Walking to burn 44 kcal

🎯

of 2,000 kcal daily goal

💪

0.94g

protein (2% of daily 50g)

⚡

servings until 2,000 kcal

🍎

Log Onions in CalRay — just snap a photo

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Frequently Asked Questions

How many calories are in Onions, red?

Onions, red contains 44 calories per 100g. A standard serving of 1 Onion (197g) provides 87 calories. It is considered a very low-calorie food (under 50 kcal/100g), making it excellent for weight management.

How much protein does Onions, red have?

Onions, red provides 0.94g of protein per 100g, which is 2% of the 50g daily recommended value. It is not a primary protein source.

How many carbs are in Onions, red?

Onions, red contains 9.93g of carbohydrates per 100g . It also provides 2.2g of dietary fiber.

Is Onions, red good for weight loss?

Yes! Onions, red is very low in calories (44 kcal/100g) and can be eaten in generous portions even on a calorie-restricted diet.

How do I track Onions, red calories accurately?

The easiest way to track onions is with CalRay. Simply snap a photo of your meal and the AI will automatically identify the food and calculate calories and macros based on the estimated portion size — no manual lookup required. You can also search by name and adjust gram weight manually.